Patent US2745991A successfully refreshed from Google Patents.
US2745991A
Expired / Lapsed
US
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Centralized load control systems
Assignee: Individual
•
Filing: 1951-01-03
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Granted: 1956-05-15
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Expires: 1971-01-03
Abstract
No abstract record available.
Inventors
- 👤 Charles E Seymour
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 22:17
CPC Classifications
H; H02; H02J; H02J3/00; H02J3/17; H02J2105/00; H02J2105/50; H02J2105/51; Y; Y02; Y02B; Y02B70/00; Y02B70/30; Y02B70/3225; Y04; Y04S; Y04S20/00; Y04S20/20; Y04S20/222
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1689867A
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US1834771A
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US2149486A
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US2183725A
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US2357995A
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US2263298A
Cited
GB551978A
Cited
US2415468A
Cited
US2457607A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-05-15 | 1959-11-14 | 1960-05-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-05-15 | 1963-11-14 | 1964-05-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-05-15 | 1967-11-14 | 1968-05-15 | $7700.00 | Window Closed / Lapsed |